﻿<template>
  <div class="login_container">
    <div class="login_box">
      <!-- 头像区域 -->
      <div class="avatar_box">
        <img src="../assets/logo.png" alt="">
      </div>
      <!-- 登录表单区域 -->
      <el-form ref="loginFormRef" :rules="LoginFormRules" :model="loginForm" label-width="80px" class="login_form">
        <!-- 用户名 -->
        <el-form-item prop="username">
          <el-input prefix-icon="iconfont icon-user" v-model="loginForm.username"></el-input>
        </el-form-item>
        <!-- 密码 -->
        <el-form-item prop="password">
          <el-input type="password" prefix-icon="iconfont icon-3702mima" v-model="loginForm.password"></el-input>
        </el-form-item>
        <!-- 按钮 -->
        <el-form-item class="btns">
          <el-button type="primary" @click="login()">登录</el-button>
          <el-button type="info" @click="resetLoginForm()">取消</el-button>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>

<script>
export default {
  data () {
    return {
      // 表单绑定的数据
      loginForm: {
        username: '',
        password: ''
      },
      // 表单验证
      LoginFormRules: {
        // 验证用户名是否合法
        username: [
          { required: true, message: '请输入登录名称', trigger: 'blur' },
          { min: 3, max: 10, message: '长度在3到10个字符', trigger: 'blur' }
        ],
        // 验证密码是否合法
        password: [
          { required: true, message: '请输入登录密码', trigger: 'blur' },
          { min: 6, max: 15, message: '长度在6到15个字符', trigger: 'blur' }
        ]
      }
    }
  },
  methods: {
    // 点击登录按钮
    login () {
      this.$refs.loginFormRef.validate(async valid => {
        if (!valid) return false
        // data解构赋值 重新命名为res
        const { data: res } = await this.$http.post('login', this.loginForm)
        if (res.meta.status !== 200) return this.$message.error('登录失败！')
        this.$message.success('登录成功！')
        // 1.将登录成功之后的token,保存到客户端的session中
        // 1.1项目中出了登录之外的其他api接口，必须在登录之后才能访问
        // 1.2token只应在当前网站打开期间生效，所以token保存在session中
        window.sessionStorage.setItem('token', res.data.token)
        // 2.通过编程式导航跳转到后台主页，路由地址是/home
        this.$router.push('/home')
      })
    },
    // 点击重置按钮，重置登录表单
    resetLoginForm () {
      this.$refs.loginFormRef.resetFields()
    }
  }
}
</script>

<style lang="less" scoped>
.login_container{
  height: 100%;
  background-color: #2b4b6b;
  .login_box{
    width: 450px;
    height:300px;
    background-color:#ffffff;
    border-radius: 3px;
    position:absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    .avatar_box{
      background-color: #fff;
      height:130px;
      width:130px;
      border:1px solid #eee;
      border-radius: 50%;
      padding:10px;
      box-shadow: 0 0 10px #ddd;
      position:absolute;
      left:50%;
      transform: translate(-50%, -50%);
      img{
        width: 100%;
        height:100%;
        border-radius: 50%;
        background-color: #eee;
        }
    }
  }
}
.login_form{
  position:absolute;
  bottom:0;
  width:100%;
  padding:0 20px;
  box-sizing:border-box;
}
.btns{
    display:flex;
    justify-content: flex-end;
  }
</style>
